How severe is CVE-2019-14322?

CVE-2019-14322 has a CVSS score of 7.5/10, rated HIGH. Immediate patching is strongly recommended.

Which packages are affected by CVE-2019-14322?

CVE-2019-14322 affects the following packages: werkzeug (PyPI). Ecosystems affected: PyPI.

How do I fix CVE-2019-14322?

Update werkzeug to 0.15.5 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2019-14322 is resolved across your whole dependency graph.

How do I detect CVE-2019-14322 in my PyPI dependencies?

Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for werkzeug, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

How do I mitigate CVE-2019-14322 if there is no patch (or I can't update yet)?

If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.

How does O3 Security protect against CVE-2019-14322?

O3 Security's impact-aware SCA analyses which vulnerable code paths your application actually calls, so a match like CVE-2019-14322 can be triaged on real exposure rather than presence alone.

Is CVE-2019-14322 actively exploited in the wild?

Yes. There are 2 known exploit references for CVE-2019-14322, including 1 documented proof-of-concept exploit on Exploit-DB and 1 in-the-wild exploitation observed on GitHub and other sources. Treat this as actively exploitable and prioritize patching immediately. All exploit code should only be run in an isolated sandbox environment for research or authorized testing — never against production systems without explicit written authorization.

What is the EPSS score for CVE-2019-14322?

CVE-2019-14322 has an EPSS (Exploit Prediction Scoring System) score of 55.8%, placing it in the 99th percentile of all CVEs. EPSS is maintained by FIRST.org and estimates the probability that a vulnerability will be exploited in the wild within the next 30 days. A score above 50% indicates significantly elevated exploitation risk — immediate patching is strongly recommended.

Is there exploit tooling available for CVE-2019-14322?

A Nuclei detection template exists for CVE-2019-14322, meaning automated scanners can fingerprint it. Public exploit tooling significantly increases real-world risk — prioritize patching and ensure detection coverage. Exploit tooling should only ever be used in isolated, authorized testing environments.

When was CVE-2019-14322 published, and has it been updated?

CVE-2019-14322 was published on July 28, 2019 and was last updated on July 8, 2026. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

🐍

🐍 PyPI

Not in CISA KEV

HIGH severity

CVE-2019-14322 — werkzeug

HIGH

CVE-2019-14322 is a high-severity (CVSS 7.5) vulnerability in werkzeug. 2 public exploit references exist, so weaponization risk is real. A fix is available for werkzeug — see the affected versions and patch details below.

Pallets Werkzeug vulnerable to Path Traversal

Also known asGHSA-j544-7q9p-6xp8PYSEC-2026-1065

Published

Jul 28, 2019

Updated

Jul 8, 2026

Affected

1 pkg

Patched

1 / 1

Exploits

2 known

Exploitation data as of Sep 19, 2026 · OSV.dev, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗

55.8%probability of exploitation in next 30 days

High Risk0.00%

Lower risk than most CVEs99th percentile — riskier than 99% of all scored CVEsHighest risk

EPSS (Exploit Prediction Scoring System) is a daily probability model maintained by FIRST.org. It estimates the likelihood a CVE will be exploited in production environments within the next 30 days, derived from real-world threat intelligence signals.

How urgent is this, really

CVE-2019-14322 plotted by exploitation likelihood (EPSS) against impact (CVSS). The shaded corner — EPSS 50%+ and CVSS 7.0+ — is where this CVE sits: patch-first territory.

Where this sits among everything scored

Of 377,166 CVEs with a current EPSS score, this one falls in the 50–90% band (highlighted). Real counts from FIRST.org, not a sample — log-scaled since the landscape is heavily right-skewed.

Real-World Exposure

1 pkg affected

🐍werkzeug

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects PyPI packages — download data is not available via public APIs for these ecosystems.

Description

In Pallets Werkzeug before 0.15.5, SharedDataMiddleware mishandles drive names (such as C:) in Windows pathnames.

Affected Packages

1 total 1 fixed

Ecosystem	Package	Vulnerable range	Fix
🐍PyPI	`werkzeug`	all versions	0.15.5`pip install --upgrade 'werkzeug==0.15.5'`

Exploits & PoCs

Research use only. For defensive security, authorized penetration testing, and academic research only. Never execute exploit code against systems without explicit written authorization.

EDB-50101webappspython

Pallets Werkzeug 0.15.4 - Path Traversal

by faisalfs10x · Jul 6, 2021

Exploit-DB Source

Detection & mitigation playbook

Open-source dependency

Detect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for werkzeug, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update werkzeug to 0.15.5 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2019-14322 is resolved across your whole dependency graph.
Workarounds
If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.
How O3 protects you
O3 Security's impact-aware SCA analyses which vulnerable code paths your application actually calls, so a match like CVE-2019-14322 can be triaged on real exposure rather than presence alone.

Tailored to CVE-2019-14322. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.

How to detect CVE-2019-14322

A community-maintained Nuclei template exists for this CVE. You can scan for it directly:

nuclei -id cve-2019-14322 -u https://target

Template: Pallets Werkzeug <0.15.5 - Local File Inclusion
Severity: high
Impact: The LFI vulnerability can lead to unauthorized access to sensitive files, potential data leakage, and remote code execution.
Remediation: Upgrade Pallets Werkzeug to version 0.15.5 or above to mitigate the LFI vulnerability.

Template by ProjectDiscovery nuclei-templates (madrobot), MIT licensed. View the full template. Scan only systems you are authorised to test.

Frequently Asked Questions

In Pallets Werkzeug before 0.15.5, SharedDataMiddleware mishandles drive names (such as C:) in Windows pathnames.

O3 Security · Impact-Aware SCA

Is CVE-2019-14322 in your dependencies?

O3 Security finds CVE-2019-14322 across PyPI dependencies, including transitive ones, and its impact-aware SCA ranks findings by whether your code actually calls the vulnerable path.

Scan my dependencies How O3 SCA works